A comparative spectroscopic study of graphene-coated vs pristine Li(Mn,Ni,Co) oxide materials for lithium-ion battery cathodes

Taehoon Kim, Bohang Song, Giannantonio Cibin, Andy Dent, Lu Li, Alexander M. Korsunsky

Research output: Contribution to journalConference articlepeer-review

Abstract

The structural properties of pristine and graphene-coated Li(Li0.2Mn0.54Ni0.13Co0.13)O2 materials were studied by the spectroscopic methods, such as Raman spectroscopy, FTIR, and synchrotron XAS. The result from Raman spectroscopy implies that the graphene coating may suppress the monoclinic phase in the pristine material and thus lead to improved stability of the cathode. The combined analyses including the synchrotron XAS have vital implications for developing in situ methods to investigate the phase transitions that are related with the stability of the active material and capacity fading during electrochemical cycling of the lithium-ion batteries.

Original languageEnglish
JournalLecture Notes in Engineering and Computer Science
Volume2210
Issue numberJanuary
Publication statusPublished - 2014
Externally publishedYes
EventInternational MultiConference of Engineers and Computer Scientists, IMECS 2014 - Kowloon, Hong Kong
Duration: 12 Mar 201414 Mar 2014

Keywords

  • FTIR
  • Lithium-layered oxide cathode
  • Raman
  • Spectroscopy
  • XAS

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